Electric burglar-alarm



(No Model.

H. F. NEUMEYERY V ELECTRIC BURGLAR ALARM. 1 3.9 Patented Sept. 5, 1882.

yINVENTORI M ATTORNEYS.

WITNESS UNITED STATES PATENT OFFICE.

HORACE F. NEUMEYER, OF MACUNGIE, PENNSYLVANIA.

ELECTRIC BURGLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 263,947, datedSeptember 5, 1882. Application filed June 1882. (No model.)

To all whom it may concern:

Be it known that I, HORAOEF. NEUMEYER, ot' Macungie, Lehigh county,Pennsylvania, have invented a new and Improved Electric Burglar-Alarm,of which the following is a full, clear, and exact description.

My invention relates to an improvement in electric burglar-alarmapparatus, having for its object to prevent interference with the con-IO tinuous sounding of the alarm by quickly closing the circuit by theburglar after entering; and it consistsin thecombiuation and arrangement ofparts substantially as hereinafter more fully set forth.

Reference is to be had to the accompanying drawing, forming part of thisspecification, and which is a plan view of my improved alarm apparatusand a horizontal section of a door with which it is connected.

The door a has a plate, j, attached to it, which is in connection withsprings kwhen the door is shut, which, when the switchpiu l is placedbetween the plates 6 to set the alarm for the night and the metalliclever a, pivoted at r, is set in contact with springs '12 and 0,establishes a circuit through the line o from copper plate u of thebattery through springs Ir, platej, wires 0, lever a, wimp, magnet t,wire m, plates 'i, and thence to zinc plate a; of the 0 battery, wherebythe magnet attracting armathe circuit broken, freeing'the armature d 5from lever a, said lever will fall away from spring 0, its pivot beingto the left of its cen ter of gravity, or by the effectof the spring I),stronger than 0, thus making a permanent breakin the circuit, the objectof which is to prevent the burglar from stopping the alarm quickly afterentering by closing the circuit again by quickly closing the door. Inthis arrangement the alarm will continue after thecircuit is thus brokenby the circuit from copper a, through wire y, spring '0, armature d,wire g, magnet t, wire m, and plates 6, to battery at or, which closesat spring 0 and armature d simultaneously with the breaking of the othercircuit at lever a and spring 0.

The apparatusis disconnected by withdrawing pin lfrotn between theplates -i when it is to be turned off.

Havingthus described my invention, I claim as new and desire to secureby Letters Patent- In an electric burglar-alarm, the combination, withthe closed 7 circuit devices, of the gravity-lever a, disposed betweenthe springs b and 0, one arranged in contact with the longer arm of saidlever and the other stronger one in contact with the shorter armthereof, the armature d, having the striking-arm disposed in contactwith thelever a, the spring e, adapted to operate on the armature d, andthe secondary circuit devices, substantially as shown and described, andfor the purpose set forth.

HORACE F. NEUMEYER.

Witnesses VVAYNE Brr'rrne, OLIVER NEUMEYER.

